Question

Question 21 of 25
A car came to a stop from a speed of 28 m/s in a time of 2.1 seconds. What
was the acceleration of the car?
OA. -9.80 m/s²
OB. -13.3 m/s²
C. -6.23 m/s²
D. -7.84 m/s²

Answer 1

The acceleration of the car, when it is made to stop is -13.33 m/s². The correct option is B

What is acceleration?

Acceleration is given by the ratio of resultant or total force acting on any object and the its mass.

It can also be defined as the rate change of velocity with time.

acceleration a = (Δv) / (Δt)

A car came to a stop from a speed of 28 m/s in a time of 2.1 seconds.

The final velocity will be zero.

So, the acceleration is

a = 0-28/2.1

a = -13.33 m/s²

Thus, the acceleration of the car is -13.33 m/s².

Learn more about acceleration.

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